Why are all the buses on the Qinghai-Tibet line green?

The color of the train on the Qinghai-Tibet line is different from the "green leather car" we usually see. It is dark green, and the main consideration is environmental protection. Everyone has seen or heard of the facilities in the car.

The train carriages entering Tibet are produced by Qingdao Sifang Locomotive and Rolling Stock Factory. As early as before the "Cultural Revolution", Sifang Locomotive and Rolling Stock Factory produced and exported double-decker buses; The EMU that started on April 18 this year was also produced by Sifang Locomotive and Rolling Stock Factory. Before the Olympic Games next year, after the opening of the newly-built Qingdao Railway Station, the original EMUs from Sifang to Shanghai will be replaced by sleepers (attention! It is a sleeper car of EMU, and it is also a car produced by Sifang Locomotive and Rolling Stock Factory.

It can be said that Sifang Locomotive and Rolling Stock Factory represents the advanced direction of bus production in China.